telly vs goggle box

telly and goggle box both are nouns.

Word	Noun	Adjective	Verb	Adverb
telly	Yes	No	No	No
goggle box	Yes	No	No	No

As nouns, telly and goggle box are synonyms defined as:

telly and goggle box: an electronic device that receives television signals and displays them on a screen

Other synonyms of telly include boob tube, idiot box, television, television receiver, television set, tv, tv set.

telly (noun)	goggle box (noun)
an electronic device that receives television signals and displays them on a screen	an electronic device that receives television signals and displays them on a screen